The colour imparted by `Co(II)` compound to glass is

Options

A. green
B. deep-blue
C. yellow
D. red

Answer

b

Explanation

Glass is an amorphous and transparent of translucent solid obtained by solidification of a mixture f silicates of different metals one of which is always an alkali metal. Addition of small amounts of transition metal salts to the glass mixture imparts colour to thhe glass. for edxample, mixture imparts colours to the glaas. For example. addition of small amounts of `Fe^(3+),Fe^(3+),Co^(2+),Cr^(3+) and Mn^(4+)` salts imparts yellow-brown , light blue, deep blue, green or violent colour respectively.